Place the diced onion, sliced carrots, chopped zucchini, minced garlic, and drained chickpeas into the slow cooker.
Add the diced tomatoes with their juices, vegetable broth, chopped apricots, cumin, cinnamon, paprika, ginger, salt, and pepper.
Stir everything until the spices are evenly distributed and the vegetables are coated.
Cover and cook on low for 6 to 7 hours, until the carrots are tender.
Taste and adjust salt or pepper if needed.
Spoon the tagine over cooked couscous and top with fresh cilantro and a squeeze of lemon.